An unusually intense (by early October standards) mid-latitude cyclone produced a variety of weather extremes across the parts of the north-central US during the 04 October to 05 October 2013 period. In the cold sector of... Read More

GOES-15 0.63 µm visible channel images (above; click image to play animation) showed a distinct hazy plume streaming southeastward from the Katmai volcano area in Alaska on 22 September 2013. This was a signature of re-suspended volcanic ash — a deep layer of ash has remained on the ground near... Read More

Heavy rain fell over much of the Front Range of Colorado overnight, with Boulder receiving an all-time 24-hour total of 9.08 inches (Weather Underground blog). Numerous CoCoRAHS locations in Boulder County reported 24-hour rainfall amounts in excess of 6″, in a region where monthly precipitation records are close... Read More

An AWIPS image of the Suomi NPP VIIRS 11.45 – 3.74 µm IR brightness temperature difference “fog/stratus product” at 10:26 UTC or 2:26 AM local time on 11 September 2013 (above) revealed a relatively narrow tongue of stratus cloud (darker orange to red... Read More